A wafer-scale hybrid 2D–3D photonic circuit focuses 405–880 nm light onto three ion sites at 5 µm pitch with −27 dB average intensity crosstalk and shows selective Ca+ repumping.
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A broadband, individually addressing two- and three-dimensional photonic integrated circuit for trapped-ion qubit control
A wafer-scale hybrid 2D–3D photonic circuit focuses 405–880 nm light onto three ion sites at 5 µm pitch with −27 dB average intensity crosstalk and shows selective Ca+ repumping.